Synergistic disposal method of hazardous waste incineration residues and solid wastes, ceramsite and application thereof

Abstract

A synergistic disposal method of hazardous waste incineration residues and solid wastes, ceramsite and an application thereof, all belonging to the field of resources and environment. The disposal method includes the following steps: mixing of the hazardous waste incineration residues and solid wastes, granulation and dehydration of the resulting mixture and calcination to obtain ceramsite. In the preparation of ceramsite by the synergistic disposal of hazardous waste incineration residues and solid wastes as the raw materials, dioxin and organic matters in the hazardous waste incineration residues and solid wastes are decomposed, meanwhile the contained heavy metals are reduced and solidified, solving the disposal problem of hazardous waste incineration residues and solid wastes, saving a lot of land for landfills, decreasing the cost for comprehensive disposal, not producing new hazardous wastes, and reducing the burden of ecological environment.

What is claimed is: 
     
       1. A disposal method of hazardous waste incineration residues and solid wastes, consisting of the following steps:
 the hazardous waste incineration residues are mixed with the solid wastes, and the resulting mixed materials are granulated, dried, calcined, and air cooled in turn to get ceramsite; 
 wherein, the hazardous waste incineration residues comprise hazardous waste incineration slag and/or hazardous waste incineration fly ash; 
 the solid wastes comprise one or more of coal ash, sludge, oil-contained silt and metallurgical slag; 
 a mass ratio of silicon dioxide, alkaline matters and organic matters in the mixed materials is (40-70):(30-60):(0.5-10); and the alkaline matters comprise metal oxides and/or metal hydroxides; 
 a hot tail gas produced from calcination is used for drying; 
 a hot air produced from air cooling is used for calcination. 
 
     
     
       2. The disposal method according to  claim 1 , wherein, the granular materials obtained after granulation have particle sizes of 5-85 mm. 
     
     
       3. The disposal method according to  claim 1 , wherein, the resulting materials after drying have a water content of ≤5 wt %. 
     
     
       4. The disposal method according to  claim 1 , wherein, the mixed materials after being dried are calcined at a temperature of 1000-1300° C. for 10-60 min.